I know how to install OS/2 Warp 4 and partition the drive so I can install two more os's. But how, when I get ready to install MS-DOS 7.1 or PC-DOS 2000, How do I tell it what partition to use? When I decide what other os to put in the other partition (Probably Xenix, but maybe Linux.), how do I tell it where to go?

For multiple OS-es I love the 'System Commander' product. They used to be http://www.v-com.com, but their name has changed to www.avanquest.com. The latest version is System Commander 9. They will clearly document things like 'this OS must be installed in first 1.5 Gb of disk space', or 'this OS must boot from within the first 1024 cylinders/tracks', or cannot install/boot this OS from an extended partition.

I've used this off and on for ten years, probably have three of the last five versions of it. On an older desktop PC, I at one time had 6 or 7 different OSes setup to boot (had about 12 partitions across 2 EIDE HDs) , including linux, windows (NT 4.0, 2000, XP and a server), one version of QNX and a DOS version. All just to see if it worked, and it did! I still have the older boxes and *printed* instruction manuals, just to look at the lists of older and lesser-known operating systems they mention.

Some of the detailed writeups describing early linux distributions (1999-2000) are still good reading.

'PC DOS 2000' is the 1999 release of PC DOS made Y2K compliant, I believe. If yes, this page says "must be installed on a primary partition on the first drive." First drive is v-com speak for primary partition on 1st EIDE drive, if you're using EIDE.

Much has been said about Multi-boot, but I think the story of Richard Robbins' Multi-boot Menagerie system should put to rest what can or cannot be done.

He claimed and verified to the satisfaction of, I believe Maximum PC Magazine, he had 39 operating systems on his computer. He used XOSL as the boot loader.

I also encourage you to find a copy of a very good book titled The Multi-Boot Configuration Handbook, published by Que, author Roderick W. Smith, ISBN:0-7897-2283-6. This is one of the easiest books to read with more information packed within its 639+ pages than any other computer book I own. (And no, I will not sell my copy.) This book even came with a copy of Partition Magic.